Thanks for the answer. When I say "simple algorithm didn't work," I mean it has resulted in like previous analysis. It has not converged, fluctuations still continue like picture that i attached below.
I follow your suggestion and checked my poor quality meshes. It is clear until 0.16 orthogonal quality(attached picture). Also this is my skewness measure:
name id cells (quality > 0.90) maximum quality cell count
------------------------- -------- ---------------------- ---------------- ----------
Overall Summary none 0 0.831676 8694808
Total Number of Cell Zones : 16
[Quality Measure : Skewness]
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